Abstract: A process for characterizing a blood sample includes: insertion, into a channel with an inlet and outlet, of a solution including blood platelets, the solution being inserted via the inlet of the channel; creating a pressure difference between the inlet and the outlet to move the solution from the inlet towards the outlet of the channel; passage of the solution into a measurement zone of the channel, provided with electrodes; measurement, by the electrodes and measurement element, of an electric signal while the electrodes are covered by the solution in the channel. The progression of the solution from the inlet towards the outlet of the channel includes a progression of a front between, on the one hand, the solution extending from the front towards the inlet of the channel and, on the other hand, a gas extending from the front towards the outlet of the channel.

Abstract: A process for characterizing a blood sample includes: insertion, into a channel with an inlet and outlet, of a solution including blood platelets, the solution being inserted via the inlet of the channel; creating a pressure difference between the inlet and the outlet to move the solution from the inlet towards the outlet of the channel; passage of the solution into a measurement zone of the channel, provided with electrodes; measurement, by the electrodes and measurement element, of an electric signal while the electrodes are covered by the solution in the channel. The progression of the solution from the inlet towards the outlet of the channel includes a progression of a front between, on the one hand, the solution extending from the front towards the inlet of the channel and, on the other hand, a gas extending from the front towards the outlet of the channel.

Abstract: The transformer ensures the transmission of electrical power by electromagnetic induction between the first (11) and second (12) coils concentrically arranged on the first (7) and second (8) tubular parts respectively, which are made of a ferromagnetic material, and coaxially mounted in such a way that an outer surface (13a, 13b, 13c) of one part can rotate in relation to an inner surface (14a, 14b, 14c) of the other. These surfaces each consist of two straight cylindrical rotation surfaces (13a, 13c; 14a, 14c) of different diameters, each extending from one of the axial ends of the part (7; 8) to an intermediate radial shoulder (13b, 14b) for connecting these surfaces. The parts (7; 8) are arranged head-to-foot one inside the other so as to delimit, between the shoulders (13b; 14b), an annular space receiving the coils (11, 12), between two annular gaps each delimited by two (13a, 14a; 13b, 14b) of the facing cylindrical surfaces of the first (7) and second (8) parts.

Abstract: The invention relates to an electromagnetic actuator with variable reluctance comprising a fixed ferromagnetic armature (3) comprising at least two concentric cylinders of revolution linked by a ring nut, at least one magnetizing winding (2) arranged between said cylinders, a ferromagnetic moving armature (4) guided in reciprocating translation movements relative to said fixed armature (3), with which it defines a magnetic circuit with an air gap (20), the dimension of which varies during reciprocating translation movements of the moving armature (4), wherein said fixed armature (3) comprises at least two series of slots, a first series of slots provided radially in said outer cylinder and extending over the entire height of said outer cylinder, and a second series of slots provided radially in said outer and inner cylinders and extending only over a major part of the height of said cylinders.

Abstract: The invention relates to an electromagnetic actuator with variable reluctance comprising a fixed ferromagnetic armature (3) comprising at least two concentric cylinders of revolution linked by a ring nut, at least one magnetizing winding (2) arranged between said cylinders, a ferromagnetic moving armature (4) guided in reciprocating translation movements relative to said fixed armature (3), with which it defines a magnetic circuit with an air gap (20), the dimension of which varies during reciprocating translation movements of the moving armature (4), wherein said fixed armature (3) comprises at least two series of slots, a first series of slots provided radially in said outer cylinder and extending over the entire height of said outer cylinder, and a second series of slots provided radially in said outer and inner cylinders and extending only over a major part of the height of said cylinders.

Abstract: The transformer ensures the transmission of electrical power by electromagnetic induction between the first (11) and second (12) coils concentrically arranged on the first (7) and second (8) tubular parts respectively, which are made of a ferromagnetic material, and coaxially mounted in such a way that an outer surface (13a, 13b, 13c) of one part can rotate in relation to an inner surface (14a, 14b, 14c) of the other. These surfaces each consist of two straight cylindrical rotation surfaces (13a, 13c; 14a, 14c) of different diameters, each extending from one of the axial ends of the part (7; 8) to an intermediate radial shoulder (13b, 14b) for connecting these surfaces. The parts (7; 8) are arranged head-to-foot one inside the other so as to delimit, between the shoulders (13b; 14b), an annular space receiving the coils (11, 12), between two annular gaps each delimited by two (13a, 14a; 13b, 14b) of the facing cylindrical surfaces of the first (7) and second (8) parts.